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Finding the Fourth Proportional to 21,868.88, 32,805.16 and 6,879.44

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Solution

The fourth proportional to 21,868.88, 32,805.16 and 6,879.44 is: 10,319.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.88 : 32,805.16 = 6,879.44 : x
  2. Step 2: Convert to fraction form
    21,868.88/32,805.16 = 6,879.44/x
  3. Step 3: Cross multiply
    21,868.88x = 32,805.16 × 6,879.44
  4. Step 4: Simplify right side
    21,868.88x = 225,681,129.91
  5. Step 5: Solve for x
    x = 225,681,129.91/21,868.88
  6. Step 6: Final answer
    x = 10,319.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.